Shock-absorber.



J. 83 A. RAAB.

SHOCK ABSORBER.

APPLIGATION FILED SEPT. 10.1913.

1 1 w fia Patented Se t. 1,1914

witnesses 1 7 I attorneys lid - leaf spring of an ordinary vehicle and seand Stateof 'ashington, have invented cer- JOHN RAAB AND ANDREW RAAB, ,OF TACOMA, WASHINGTON.

SHOCK-ABSORBER.

Specification of Letters Patent.

I fizjopllcatlon'filed September 10, 1913. Serial No. 789,178.

Tool Z whom it may concern Be it known that we, JOHN RAAB and .lxnnnw RAAB, cltizens of the United States,

residing at Tacoma, in the county of Pierce tain new and useful Improvements in Shock- Absorbersyand we dohereby declare the following to be a full, clcar,,and exact description of the inventicn. such as will enable others skilled in tho-art to which it appertains to make and use the same.

This invention relates to in'iprovementsin shock absorbers for automobiles. and an object of the invention is toprovide a shock absorber having a rolling contact with the cured to the axle of the vehicle in such a way as to be guided bv said axle as the ab sorber assumes different positions.

A further obiect of the invention is to provide an absorber secured at one end of an axle and having a free end extending toward the center of the axle carrying anti-friction means for engaging the spring of the vehicle.

A further object of the invention is to provide an absorber the resilient portion of which is located upon one side of an axle, while the portion engaging the ordinary spring extends upon the other side of the axle, the whole construction being simple and held in place by the axle.

With these and other objects in view. the invention consists in certain constructions, combinationsand arrangements which will be hereinafter fully described and claimed.

In the drawings Where similar reference characters designate corresponding parts, Figure 1 shows one end'of an axle having the ordinary wheel and leaf elliptical spring with the absorber applied thereto; Fig. 2 is an enlarged perspective view of the absorbing device shown in Fig. 1; Fig. v3 is a top plan view of the spring formingpart of the absorber; and Fig. 4 is a detail view showing one means of adjusting the spring.

The general aim of the invention is to provide a pair of springs with loops located. below the axle of the'vehicle to which the absorber is applied, th end of the "springs adjacent the loops being secured to the under side of the axle by any suitable means, While the ends remote from the loops, extend one to each side of the axle, and are adj ustably connected to. a common roller which frictionally engagesa-deaf or elliptical spring such as is connnonlv used in vehicle constructions.

Referring to the drawings, 1 designates one end of an axle having the ordinary wheel 2, and having an ellipti -al leaf spring 3, which is secured as at 4, to the axle in any approved manner forming no part of the present invention. The resilient member forming the absorber comprises a spring 7 formed of steel wire or other suitable niaici"ial having parallel sides (5 which termirate at one end in eyes 7 while the other ends are bent to form loops 8, from which the central portion 9 of the spring extends, the

construction being substantiallyas shown in Figs. 2 and of the drawing. =ln order that the spring may be secured to th'e axle, there is providcda strap 10 having depending therefrom on each side, a screw ll although one screw only is shown in the drawing. These screws 11 receive nuts 12 which bind a plate 13 against the central portion 9 of the absorber spring, so that the said end 9 is held securely against the under side of the axle. By mounting the plate 13 a short distance from the end of the central portion 9. the two sides of the loop 9 will receive the rounded portion of the axle and will therefore beheld against rotating movement about the screws.

The eyes 7 are designed to receive screws 14 upon whiclrare mounted nuts 15 and 16 res 'icctively, these nuts 15 and 1.6 adapted to lie one upon each side of the eyes 7. The upper end. of the screw nut 14 is provided with a shank 17 which receives a trunnion 18 mounted upon each end of a roller 19. The outer ends of these trunnions may be threaded to receive a nut 20 for the purpose of securing the roller 19 to the phrallel sides 6 of the spring 5.

By referring to Fig. 1. it will be seen that the roller 19 is disposed beneath the leaf spring 3, and that as the said spring 3 moves under the action offlthe car in motion, the roller will move back and forth on the under side thereof, and it will be noted'that the greater the depression of the spring 3, the greater the distortion of. the absorber will be, inasmuch as any downward movement of the roller 19 is accompanied by an increasing resistance ofi'ered by the loop 8 of the spring It will further be noted that-as the axle passes between the parallel sides 6 and as the central portion 9 is secured he- Xatented Sop-13,1, 1914;.

- Fig. 52, although neath the axle, this particular form of mounting. will uide the roller 19 against the spring t' course itwill be Within the scope of the present invention to vary 5 the number of loops 8, and we may also vary the method of connecting the eyes 7 to the roller 19. it is desirable to have the eyes 7 adjustable with r spect to the roller 19 as is made possible by the construction shown in this is no considered alto- ,gether necessary.

What I claim is: l. A shock absorber for vehicles comprising a resilient member, one end of which secured to the lower side of the axle of the vehicle, parallel. portions being formed on the resilient member one extcmlingupon each side of the axle, and an anli-lriction member mounted between said parallel mem- 20 bers adapted to engage an elliptical spring carried by the vehicle. 2. A shock absorber for vehicles comprising a resilient member, the lower end'ol 'which is secured to the axle adjacent one end thereof, there being substantially parallel portions on the resilient member extending one upon each side of the axle, and an antilrietion member mounted between said substantially parallel portions adapted to enl l l r gage an elliptical spring carried by the vehicle,-said parallel portions extending to ward the center of the axle.

3. A shock absorber il or vehicles comprising a resilient member, the central portion of which is bent to present substantially parallel portions adapted to engage the ide of the axle, means for holdil'igsubstantially parallel portions against the axle, and means carried by the resilient inember for engaging the elliptical spring ol: the vehicle.

4. A shock ing' a bent spring member having; two looped ends, adjustable roller carrying means pass ing through said looped ends, and a roller arried by said carrying means adapted to engage the heat" spring of the vehicle.

5. shock absorl' er t'o'r achioles comprising a bent spring member secured tothc axle absorber for vehicles romprisof the vehicle, and having two ends extending therefrom, upon each side sparing the ends of member comprising adapted to engage the liicle. i

6. It shock absorber for vehicles con1pris inga bent spring member, the central portion of which has substantially parallel sides adapted to engage the axle of the vehicle, a trap surrount ingsaid axle having depending e'ids lying-upon each side of the axle, ill-ans engagi lg said depending ends adaptcd l o loc.k the central portion of the resilient men'iber to the axle, and anti-friction means carried bf, the ends of the axle member adapted. to engage vehicle.

T. A shock absorber for vehicles comprisin o a bent spring member the central portions of which comprise substantially parallel sections of the resilient member, means of the axle, and means for said ends, said spacing antifriction means {for securing said central section to the axle of the vehicle, means preventing spreading of said suestantially parallel sections, and an anti-friction member carried by thefree ends of said resilient member adapted to engage the leaf spring of the vehicle.

8. A shock absorber for vehicles secured to the axle of a car, and having two extend ing ends provided with eyes, threaded rods extending through and adjust-ably connected to said eyed ends, one end of each of said tlnmaded rods being orovided with an openunder ing, a roller located between said. ends of the rods and having; ournals extending through the opeiiings of the threaded rods, and means for holding the journals within the openings of the rods.

in testimony whereof we afiix our signa lures in presence of two Witnesses.

JOHN BAA ll. ANDREW? Rita B. Witnesses:

Carin N. S'rmvnnno, Vrna Sunnnnne.

one of said ends extending leaf spring or a ve-.

the leaf spring of the p 

